The binding sites of Potassium atom in the structure of Structure of E. Coli Uridine Phosphorylase Complexed to 5-(M- (Benzyloxy)Benzyl)Barbituric Acid (Bbba) (pdb code 1u1g). This binding sites where shown with 5.0 Angstroms radius around Potassium atom. The 1u1g structure was solved by W.BU, E.C.SETTEMBRE, S.E.EALICK, with X-Ray Crystallography technique, brief refinement statistics is given in the table below: